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The world's best gem articles, published weekly.
Most Recent Articles
Are Diamonds Really Rare? Diamond Myths and Misconceptions
Diamonds are popular gemstones surrounded by popular misconceptions. We’ll tell you how they became so prized and debunk some of those diamond myths, too.
Pearl Buying Guide
In this golden age of pearls, a wide variety of shapes, sizes, and colors are available. Our pearl buying guide can help you select a pearl you’ll love.
Ametrine Value, Price, and Jewelry Information
Ametrine is a variety of quartz that displays bands of both amethyst purple and citrine yellow. These gems are typically cut to showcase their dramatic color zoning.
Jewelry Metals 101: Gold, Silver, and Platinum
Gold, silver, and platinum are the most commonly used jewelry metals. Learn about their physical properties, alloys, and history.
The White Paper Test and Rough Gem Buying
How can gem cutters predict the color that gem rough will likely show when cut? Learn how the simple white paper test can help you buy the right material.
A Visitor’s Guide to Colorado Gemstones
Colorado has a lot to offer gemologists and rock hunters. Before you visit, learn about Colorado gemstones as well as notable gem shows, museums, and clubs.
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Sign up for a Pro Membership"Becoming a Pro Member of IGS just made good sense for my business. The gemology resources are fantastic, and my profile lets potential customers know I am serious about colored gemstones. And frankly, if I get any exposure to potential customers it's a no-brainer."Paul Bierker, Paul Michael Designs
Jeweler, IGS Pro Member
